maint: bump vtk from 9.3.1 to 9.4.0 #2034

Job	Run time
Documentation Style Check	14s
Check library vulnerabilities (default mode - only on main)	0s
Check library vulnerabilities (development mode)	43s
Code style	53s
Update CHANGELOG (on release)	0s
Doc building	3m 50s
Build and Smoke tests (ubuntu-latest, 3.10, false)	53s
Build and Smoke tests (ubuntu-latest, 3.11, false)	56s
Build and Smoke tests (ubuntu-latest, 3.12, false)	1m 15s
Build and unit testing (v23.1-ubuntu)	38s
Build and unit testing (v23.2.0)	38s
Build and unit testing (v24.1-ubuntu-student)	38s
Package library	0s
Release project to public PyPI and GitHub	0s
Deploy development documentation	0s
Deploy stable documentation	0s
	10m 38s

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